Dear All,
I want to insulate my outbuilding roof. The roof consists of (new) corrugated iron on wood rafters. It is not a flat roof and has a gentle incline.
The problem is that on cold days/nights frost forms inside the building on the underside of the corrugated iron and then melts as the temperature raises, soaking everything in the building.
What I was thinking of doing was buying insulating plasterboard, sticking a polythene covering on the topside of this and boarding the roof leaving the requisite gap between the roof and the plasterboard for free flow of air. First thing, do you think this is a good idea? Secondly there is bound to be still some condensation between the tin roof and the plasterboard and therefore, will the boarding just become soggy and rot?
Help!
Thanks,
Curlew
I want to insulate my outbuilding roof. The roof consists of (new) corrugated iron on wood rafters. It is not a flat roof and has a gentle incline.
The problem is that on cold days/nights frost forms inside the building on the underside of the corrugated iron and then melts as the temperature raises, soaking everything in the building.
What I was thinking of doing was buying insulating plasterboard, sticking a polythene covering on the topside of this and boarding the roof leaving the requisite gap between the roof and the plasterboard for free flow of air. First thing, do you think this is a good idea? Secondly there is bound to be still some condensation between the tin roof and the plasterboard and therefore, will the boarding just become soggy and rot?
Help!
Thanks,
Curlew